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MS21923D3 — ADAPTER,STRAIGHT,TUBE TO BOSS

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

MS21923D3: ADAPTER,STRAIGHT,TUBE TO BOSS.

The ADAPTER,STRAIGHT,TUBE TO BOSS is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024 OVERALL, seat_angle: 12.0 DEGREES FIRST END, thread_class: 3A CENTER BULKHEAD A, connection_style: FLARED W/ GASKET SEAL (BOSS) SECOND END, surface_treatment: ANODIZE OVERALL, nominal_thread_size: 0.375 INCHES CENTER BULKHEAD IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-059-8372, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
MS21923D3
NSN: 4730-00-059-8372
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 0U583 — SAE INTERNATIONAL DBA SAE INTERNATIONAL (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024 OVERALL
seat_angle12.0 DEGREES FIRST END
thread_class3A CENTER BULKHEAD A
connection_styleFLARED W/ GASKET SEAL (BOSS) SECOND END
surface_treatmentANODIZE OVERALL
nominal_thread_size0.375 INCHES CENTER BULKHEAD IN
nominal_overall_length1.625 INCHES IN
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS
specification/standard_data96906-MS21923 GOVERNMENT STANDARD
nominal_outside_diameter_tube_accommodated0.188 INCHES FIRST END IN
NSN4730-00-059-8372
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS21923D3 · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
CONNECTION STYLE: FLARED W/ GASKET SEAL (BOSS) SECOND END
•
NOMINAL OVERALL LENGTH: 1.625 INCHES IN
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.188 INCHES FIRST END IN
•
NOMINAL THREAD SIZE: 0.375 INCHES CENTER BULKHEAD IN
•
SEAT ANGLE: 12.0 DEGREES FIRST END
•
SPECIFICATION/STANDARD DATA: 96906-MS21923 GOVERNMENT STANDARD
TECHNICAL CHARACTERISTICS
CONNECTION STYLEFLARED W/ GASKET SEAL (BOSS) SECOND END
CONNECTION STYLEFLARELESS (TUBE) FIRST END
NOMINAL OVERALL LENGTH1.625 INCHES IN
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.188 INCHES FIRST END IN
NOMINAL THREAD SIZE0.375 INCHES CENTER BULKHEAD IN
NOMINAL THREAD SIZE0.375 INCHES ALL ENDS IN
SEAT ANGLE12.0 DEGREES FIRST END
SPECIFICATION/STANDARD DATA96906-MS21923 GOVERNMENT STANDARD
SURFACE TREATMENTANODIZE OVERALL
THREAD CLASS3A CENTER BULKHEAD A
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES 1
SAE-AS18280Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MS21923D3?
MS21923D3 is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace MS21923D3?
There is 1 known substitute for MS21923D3: SAE-AS18280. Substitute compatibility should be verified for your specific system.
What is the NSN for MS21923D3?
MS21923D3 is cataloged in the U.S. Government catalog under NSN 4730-00-059-8372. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.